Table 78. Operation characteristics
Parameter Value (Range)
Operating curve type 1 = ANSI Ext. inv.
2 = ANSI Very. inv.
3 = ANSI Norm. inv.
4 = ANSI Mod inv.
5 = ANSI Def. Time
6 = L.T.E. inv.
7 = L.T.V. inv.
8 = L.T. inv.
9 = IEC Norm. inv.
10 = IEC Very inv.
11 = IEC inv.
12 = IEC Ext. inv.
13 = IEC S.T. inv.
14 = IEC L.T. inv
15 = IEC Def. Time
17 = Programmable
18 = RI type
19 = RD type
Operating curve type (voltage protection) 5 = ANSI Def. Time
15 = IEC Def. Time
17 = Inv. Curve A
18 = Inv. Curve B
19 = Inv. Curve C
20 = Programmable
21 = Inv. Curve A
22 = Inv. Curve B
23 = Programmable
16. Interconnection functions
Table 79. Directional reactive power undervoltage protection (DQPTUV )
Characteristic Value
Operation accuracy Depending on the frequency of the measured
current and voltage:
fn ±2 Hz
Reactive power range |PF| <0.71
Power:
±3.0% or ±0.002 × Qn
Voltage:
±1.5% of the set value or ±0.002 × Un
Start time
62, 63
Typically 46 ms
Reset time <50 ms
Reset ratio Typically 0.96
Operate time accuracy ±1.0% of the set value or ±20 ms
Suppression of harmonics DFT: -50 dB at f = n × fn, where n = 2, 3, 4, 5,…
Table 80. Directional reactive power undervoltage protection (DQPTUV)
main settings
Parameter Function Value (Range) Step
Voltage start value DQPTUV 0.20...1.20 × Un 0.01
Operate delay time DQPTUV 100...300000 ms 10
Min reactive power DQPTUV 0.01...0.50 × Sn 0.01
Min Ps Seq current DQPTUV 0.02...0.20 × In 0.01
Pwr sector reduction DQPTUV 0...10° 1
62 Start value = 0.05 × Sn, reactive power before fault = 0.8 × Start value , reactive power overshoot 2 times, results based on statistical distribution of 1000 measurements
63 Includes the delay of the signal output contact
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